{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.680","julian_year":2026.68,"time":"2026-09-06T09:50:25.023Z","years_from_j2000":26.68,"frame":"date","applied":"Proper motion, then precession and nutation. The catalogued J2000 position is carried along the great circle the object's own published motion puts it on, at a constant velocity, and the result is referred to the true equator and equinox of this instant. Those are separate things: the motion moves the object, and the rotation turns the grid under it by about fifty arcseconds a year, with nutation adding up to another seventeen.","excluded":"Parallax, the radial-velocity perspective term, aberration and refraction; each is below the accuracy of the catalogued positions themselves. An object with no published proper motion comes back where the catalogue has it rather than at a fabricated zero, and says so with a null pm_ra_mas_yr. A body with no fixed position is not propagated at all — its place comes from an ephemeris, which is what /api/v1/visible answers with."},"slug":"hd-191445","name":"HD 191445","class":"k4iii_orange_giant","category":"star","object_type":"K4III orange giant","mag":7.91,"mag_band":"V","abs_mag":0.083,"abs_mag_band":"V","distance_ly":1199.1044641406534,"distance_method":"parallax","ra_deg":302.23806,"dec_deg":28.684301,"epoch_ra_deg":302.512247,"epoch_dec_deg":28.762284,"epoch_moved_arcsec":0.704,"pm_ra_mas_yr":-14.55,"pm_dec_mas_yr":-22.01,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Vulpecula","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/hd-191445","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"wds_id":"20090+2841","companions":[{"measured":2015,"magnitude":12.4,"components":null,"discoverer_code":"DA   12","separation_arcsec":26.2,"position_angle_deg":88}],"mass_solar":4.301,"radius_solar":33.58,"spectral_type":"K4III","color_index_bv":1.537,"luminosity_solar":80.68633703638186,"radial_velocity_km_s":33,"spectral_type_source":"SIMBAD (quality C)","surface_gravity_log_g":1.815,"surface_temperature_k":4667,"proper_motion_ra_mas_yr":-14.55,"proper_motion_dec_mas_yr":-22.01,"stellar_parameters_method":"Gaia DR3 model fit (GSP-Phot, FLAME; RUWE ≤ 1.4)","bolometric_luminosity_solar":389.1416},"designations":[{"catalog":"HD","designation":"HD 191445"},{"catalog":"HIP","designation":"HIP 99258"}],"source":{"id":"hyg","name":"HYG Database v4.1","url":"https://github.com/astronexus/HYG-Database","license":"CC-BY-SA-4.0"},"updated_at":"2026-09-02T19:50:56.720Z","attribution":"Data from SpaceCatalog.org. Individual records carry their source and license in `source`; attribution is required for CC-BY and CC-BY-SA rows."}